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 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
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 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 */

#pragma once

namespace amgx
{

class AsyncEvent
{
    public:
        AsyncEvent() : async_event(NULL) { }
        AsyncEvent(int size) : async_event(NULL) { cudaEventCreate(&async_event); }
        ~AsyncEvent() { if (async_event != NULL) cudaEventDestroy(async_event); }

        void create() { cudaEventCreate(&async_event); }
        void record(cudaStream_t s = 0)
        {
            if (async_event == NULL)
            {
                cudaEventCreate(&async_event);    // check if we haven't created the event yet
            }

            cudaEventRecord(async_event, s);
        }
        void sync()
        {
            cudaEventSynchronize(async_event);
        }
    private:
        cudaEvent_t async_event;
};

}
